Figure 22From: An Overview of the Coding Standard MPEG-4 Audio Amendments 1 and 2: HE-AAC, SSC, and HE-AAC v2Average scores (MOS) versus bit rate for coded stereo signals. The filled circles indicate the SSC coder (at 16, 20, and 24 kbps), the stars the AAC coder (at 24, 32, and 48 kbps). The open circles on the right-hand side are the anchors (hidden reference, 7 kHz and 3.5 kHz low-pass filtered versions from top to bottom, resp.). The 95% confidence intervals have as typical range 0.3 MOS units. Adapted from [58].Back to article page